Steam-drying device.



No. 784,293. PATENTED MAR. 7, 1905.

HFV. ARNOLD & A. H. KRESS.

STEAM DRYING DEVICE.

APPLICATION FILED MAY 2, 19'04.

2 SHEETS-SHEET '1.

W/TNESSES, TUFT No. 784,293. PATENTED MAR. 7, 1905.

H. V. ARNOLD & A. H. KRESS.

STEAM DRYING DEVICE.

APPLIOATION FILED MAY 2, 1904.

2 SHEETS-411E151 2- WITNESSES, NTUR UNITE STATES Patented March '7,1905.

PATENT OFFICE.

HARRY V. ARNOLD AND AUGUSTUS H. KRESS, OF SAN FRANCISCO,- CALIFORNIA.

STEAM-DRYING DEVICE.

SPECIFICATION formingpart of Letters Patent No. 784,293, dated March 7,1905.

Application filed May 2, 1904:. Serial No. 205.982.

To (1.7] whom it may concern:

Be it known that we, HARRY V. ARNOLD and AUGUSTUS H. Kaass, citizens ofthe United States, residing in the city and county of San Francisco andState of California, have invented new and useful Improvements inSteam-DryingDevices, of which the following is a specification.

Our invention relates to a device which is especially designed toseparate steam from water with which it is associated in steamboilersand the like and to' produce a substantially dry steam for use.

It consists in the combination and arrangement of parts and indetails ofconstruction, which will be more fully explained by reference to theaccompanying drawings, in which- Figure 1 is a view, partly in section,of a Scotch boiler, showing the application of our apparatus. Fig. 2 isa part section of a water-tube boiler, showing the same. Fig. 3 is anenlarged section of our device. Fig. 4 is a plan View of same with topflange partly broken away.

It is the object of our invention to provide a device which isespecially applicable to steam-boilers and like generators for thepurpose of obtaining dry steam for such use as may be required.

In the ordinary construction of boilers and generators the steamgenerated by the ebullition of the water carries up with it aconsiderable proportion of moisture, and this especially creeps up theside of the boiler and is carried by the rush of steam into the steam-.

drum or other receptacle, so that the steam is there loaded withmoisture. Our invention is designed to separate and precipitate thismoisture, so that steam may pass into the steam drum or pipe in acomparatively dry condition.

We have shown the application of our apparatus to two forms ofboilers-namely, the Scotch boiler and the water-tube boiler;

but it will be understood that it is equally applicable to locomotiveand other similar boilers.

As shown in the drawings, A is the upper part of the boiler or, in thecase of water-tube boilers, the receptacle into which the steam from thelower portion is delivered.

2 represents plates fixed in the boiler or receptacle and extendingtoward the center thereof, so that as the moisture-laden steam passes upthe sides of the steam-receptacle it strikes these plates, and a largeportion of the moisture is separated therefrom and drops back into thewater below. The steam passing around the edges of. these plates on itsway to the delivery-pipe is again obstructed as follows: 3 representsthe delivery-pipe leading to the steam drum or pipe, and to the innerend of this, within the upper part of the boiler, is secured a ring orflange 4, having an opening through it coincident with that of the pipe.Beneath this flange is fixed a screen 5, which may have any suitablemesh. We have found that one-quarter-inch mesh is very efficient for thepurpose. Beneath this screen is a ring 6, and beneath this ring a secondscreen 7. Another ring 8 is located beneath the screen 7. Beneath thering 8is apan or receiver 9, and this has a larger diameter than therings and screen, so that there is an annular opening in the upper partof this pan surrounding the rings and through which steam may enter fromthe upper part of the boiler. This pan is held at a sufficient distancefrom the rings by tubular sleeves 10, extending between the lowermostring 8 and the bottom of the pan, and holes being made through thebottom of the pan the ring-bolts 11 are screwed into the ring or flange4, which is secured to the discharge-pipe, and by means of nuts 12 uponthe lower ends of the bolts or equivalent means these pipes are allfirmly secured together. The steam, after striking the plates 2, willthen pass in a more or less tortuous direction into the pan, thencestriking the screens 7 5. The moisture carried by the steam at thispoint will be deposited upon these screens and will then drip back intothe pan 9. By this disposition of the parts the moistureladen steam isprevented from being carried into the steam drum or pipe by the rush ofthe steam, and the water which falls into the pan may be dischargedthrough a central opening, as at 13, which allows it to drip back intothe boiler.

By this device we have greatly increased the elficiency of the steam andreduced the expense for fuel.

Having thus described our invention, what we claim, and desire to secureby Letters Patent, is

1. A steam-drying attachment for boilers consisting ofprecipitating-plates located in the boiler above the water-line andextending inwardly in converging plates substantially across the path ofthe ascending steam and a separating device at the inner end of thesteamdischarge pipe and made pan-shaped, and over the edge of which thesteam passes to said pipe, said device of greater diameter than thedischarge-pipe, and spaced from the latter, and a plurality of screensbetween the device and the inlet end of the pipe.

2. A steam-drying attachment for boilers consisting of a ring fixed tothe steam-discharge pipe, a plurality of rings and intermediate screensat the inlet to said pipe, a pan underlying the lowermost ring, meansspacing the pan from the last-named ring, and bolts passing through thepan, and the rings and screwed into engagement with the first-namedring.

3. An improved steam-drying attachment for boilers and the like saidattachment comprising plates fixed to the sides of the boiler above thewater-line and extending inwardly toward each other and substantiallytransversely across the path of the ascending steam, a pan-shaped vesseldisposed axially in line with the steam-discharge pipe and the spacebetween the inner ends of said plates, and of larger diameter than saidpipe, a plurality of screens and rings fixed across the end of saidpipe, a ring on the pipe against which the uppermost screen seats,spacing-sleeves between the lowermost ring and the bottom of the pan,and bolts passing through the pan and rings and engaging the ring on thesaid pipe.

In testimony whereof we have hereunto set our hands in presence of twosubscribing witnesses.

HARRY V. ARNOLD. AUGUSTUS H. KRESS.

